bisecting fixing commit since cbfa1702aaf69b2311ea1b35e04f113c48368c67
building syzkaller on ff4a3345a1b2a40ff1b8b983153d0b1fcc72f1c5
testing commit cbfa1702aaf69b2311ea1b35e04f113c48368c67
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 49ed1b5555f6760dc50cae8e038b37fd9d0ef1d94d7daff38ecfbfad594ef59f
all runs: crashed: possible deadlock in perf_event_ctx_lock_nested
testing current HEAD dffb5c6ff09c51ed585e3e7665143df103867fc8
testing commit dffb5c6ff09c51ed585e3e7665143df103867fc8
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 3917eb6329db4d8e761e3e302ac5aceb6157f411a0fb1edbb7273916503444f1
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 26m19.577089492s (build: 19m2.321215946s, test: 6m37.465676131s)
the crash still happens on HEAD
commit msg: Linux 4.14.280
crash: unregister_netdevice: waiting for DEV to become free
Bluetooth: hci0 command 0x0409 tx timeout
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1
Bluetooth: hci0 command 0x041b tx timeout
Bluetooth: hci0 command 0x040f tx timeout
Bluetooth: hci0 command 0x0419 tx timeout